// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_IDLE_H_
#define GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_IDLE_H_

#include <list>

#include "gpu/command_buffer/service/async_pixel_transfer_manager.h"

namespace gpu {

class AsyncPixelTransferManagerIdle : public AsyncPixelTransferManager {
public:
    explicit AsyncPixelTransferManagerIdle(
        bool use_teximage2d_over_texsubimage2d);
    ~AsyncPixelTransferManagerIdle() override;

    // AsyncPixelTransferManager implementation:
    void BindCompletedAsyncTransfers() override;
    void AsyncNotifyCompletion(
        const AsyncMemoryParams& mem_params,
        AsyncPixelTransferCompletionObserver* observer) override;
    uint32 GetTextureUploadCount() override;
    base::TimeDelta GetTotalTextureUploadTime() override;
    void ProcessMorePendingTransfers() override;
    bool NeedsProcessMorePendingTransfers() override;
    void WaitAllAsyncTexImage2D() override;

    struct Task {
        Task(uint64 transfer_id,
            AsyncPixelTransferDelegate* delegate,
            const base::Closure& task);
        ~Task();

        // This is non-zero if pixel transfer task.
        uint64 transfer_id;

        AsyncPixelTransferDelegate* delegate;

        base::Closure task;
    };

    // State shared between Managers and Delegates.
    struct SharedState {
        explicit SharedState(bool use_teximage2d_over_texsubimage2d);
        ~SharedState();
        void ProcessNotificationTasks();

        const bool use_teximage2d_over_texsubimage2d;
        int texture_upload_count;
        base::TimeDelta total_texture_upload_time;
        std::list<Task> tasks;
    };

private:
    // AsyncPixelTransferManager implementation:
    AsyncPixelTransferDelegate* CreatePixelTransferDelegateImpl(
        gles2::TextureRef* ref,
        const AsyncTexImage2DParams& define_params) override;

    SharedState shared_state_;

    DISALLOW_COPY_AND_ASSIGN(AsyncPixelTransferManagerIdle);
};

} // namespace gpu

#endif // GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_IDLE_H_
